Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner, showing my new design;

FIG. 2 is a front elevational view thereof, wherein the rear elevational view is a mirror image;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof, the elements shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a vacuum cleaner, as shown and described. 